Improvement in dies for making axle-boxes



UNITED STATES PATENT OEEIcE.

DAVID DALZELL, 0F SOUTH EGREMONT, MASSACHUSETTS.

IMPROVEMENTJN DIES FOR MAKING AXL-BOXES.`

Specification forming part of Letters Patent No. 216,837, dated June 24,1879; application led December 5, 1878.

To all whom it may concern:

Be it known that I, DAVE) DALzELL, of South Egremont, in the county ofBerkshire and State of Massachusetts, have invented a new and usefulImprovement in Dies for Making Axle-Boxes; and I do hereby declare thatthe followingis a full, clear, and exact description thereof, referencebeing had to the accompanying drawings, forming a part of` thisspecification, in Which- Figure 1 represents a plan view; Fig. 2, ahorizontal central sectional View, and Fig. 3 a face View of one ofthepartible die-blocks.

.The object of this invention is toform a wrought axle-box from a solidbar or rod of metal by subjecting such bar or rod to a forging heat, andclamping the same between partible die-blocks of the desiredconformation, and then forcing a plunger centrally through or at suchdistance Within the `heated metal as to produce by displacement thedesired internal and exterior shape of the box, as hereinafterdescribed.

. In order that others may understand and use my invention, I will firstproceed to 4describe the same in connection with' the `accompan yingdrawings, in which are illustrated devices designed to produce a boxparticularly adapted for use in connection with the well-known rubbercushion, so that the ad vantages attending this invention may be fullyappreciated, as this special form of box referred to cannot be Wroughtfrom tubing by the upsetting process heretofore practiced in theformation of ordinary boxes, for the rea-` son that the projecting earrequired to secure the rubber cushion in place is so situated and ofsuch extreme length that sufficient metal to produce it by displacementis not available at or near its location.

.In the drawings, A A represent the partible die-blocks, Which aredesigned to be connected with a mechanism for effecting a closing andreceding horizontal movement of the same in the usual manner.

B represents theplunger, which is directed centrally Within thedie-blocks when closed by itsconnected reciprocating cross-head, and issteadied and guided by the extension-blocks n a, secured to therespective die-blocks.

The form of the penetrating portion of the plunger B'should be inaccordance with the interior of the box, and of such length as to passentirely through the heated bar or rod,

or at such distance Within the same as to dis- `place sufficient stockto produce the enlarged and projecting parts.

1n the present instance I have shown a plunger adapted to effect thelatter result, the remaining solid portion of the boxbeing subsequent-lybored out.

C represents a shearing vor trimming knife, arrangedtransversely to thepath of the plun gerB, and at a point to cut the heated bar or rod tothe required length, and to subsequently act as a support or stop to beend of the same. This knife is firmly secured in this instance to one ofthe die-blocks, and in the closing movement of the same shears oft' theend of the heated bar or rod to the proper length to form the box, andenters a recess, c, in the opposite block. After the knife has performedthis function, and the die-blocks have simultaneously closed and clampedthe heated bar or rod, it then serves the purpose of a firm support tothe end of the heated bar.

When subsequently acted upon bythe pluri-- ger, and when the plunger isdesigned to pass the entire length of the die-blocks, the knife may beperforated to permit the .passage of the extreme end of the plunger.

D D'represent detachable steadying-pins or rests for supporting andmaintaining the heated bar or rod in a proper position for the action ofthe die-blocks and knife. These pins or rests are arranged horizontallyand transversely of the die-blocks, and located beneath and near eitherend of the matrix that forms the box, as shown in'Fig. 1,*one end ofeach pin being connected with one of the dieblocks, and their free endscaused to enter corresponding recesses in the opposite dieblocks in theclosing movement.

Having thus fully described my invention, in connection with suchoperative parts of a machine for practicing it, and sufficiently todirect those skilled in the art to which it appertains to use the same,what I claim, and

desire to secure by Letters Patent, is-

The partible die-blocks A A, provided with the intermediate rests orsteady-pins, D D, andthe knife C, in combination With the reciprocatingplungeruB, substantially as described.

o DAVID DALZELL, Witnesses:

FRED. W. SANBORN, R. G. TAFT.

